catch up tests to recent changes

* po/pi1/2 aliases have been removed
* default print of config help is on its own line

IPython/config/tests/test_configurable.py

@@ -47,9 +47,11 b' class MyConfigurable(Configurable):'
 
 mc_help=u"""MyConfigurable options
 ----------------------
-MyConfigurable.a : Int [default: 1]
+MyConfigurable.a : Int
+    Default: 1
     The integer a.
-MyConfigurable.b : Float [default: 1.0]
+MyConfigurable.b : Float
+    Default: 1.0
     The integer b."""
 
 class Foo(Configurable):

IPython/testing/tools.py

@@ -197,7 +197,10 b' def ipexec(fname, options=None):'
     
     # For these subprocess calls, eliminate all prompt printing so we only see
     # output from script execution
-    prompt_opts = ['pi1=""', 'pi2=""', 'po=""']
+    prompt_opts = [ 'InteractiveShell.prompt_in1=""', 
+                    'InteractiveShell.prompt_in2=""', 
+                    'InteractiveShell.prompt_out=""'
+    ]
     cmdargs = ' '.join(default_argv() + prompt_opts + options)
     
     _ip = get_ipython()